TONER PARTICLES OF CONTROLLED MORPHOLOGY
First Claim
1. A method for the preparation of electrostatographic toner comprising the steps of:
- a) dissolving a polymer material in an organic solvent to form an organic phase;
b) dispersing the organic phase in an aqueous phase comprising a particulate stabilizer and a salt comprising an anion selected from the group consisting of chloride, oxychloride, sulfate, perchlorate, nitrate, dihydrogen phosphate, lactate, trifluoromethylsulfonate, and trifluoromethylhydrate and a cation selected from the group consisting of aluminum, iron (III), tin (II) and zirconium (IV), to form a dispersion and homogenizing the resultant dispersion;
c) evaporating the organic solvent and recovering a resultant product; and
d) washing and drying the resultant product.
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Accused Products
Abstract
The present invention is a method for the preparation of electrostatographic toner including the following steps. A polymer material is dissolved in an organic solvent to form an organic phase. The organic phase is dispersed in an aqueous phase that includes a particulate stabilizer and a salt including an anion selected from chloride, oxychloride, sulfate, perchlorate, nitrate, dihydrogen phosphate, lactate, trifluoromethylsulfonate, and trifluromethylhydrate and a cation selected from aluminum, iron (III), tin (II) and zirconium (IV), to form a dispersion. The dispersion is homogenized. The organic solvent is evaporated from the dispersion and the resultant product is recovered, washed and dried. In an alternate method the salt is added directly to the dispersion.
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Citations
20 Claims
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1. A method for the preparation of electrostatographic toner comprising the steps of:
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a) dissolving a polymer material in an organic solvent to form an organic phase; b) dispersing the organic phase in an aqueous phase comprising a particulate stabilizer and a salt comprising an anion selected from the group consisting of chloride, oxychloride, sulfate, perchlorate, nitrate, dihydrogen phosphate, lactate, trifluoromethylsulfonate, and trifluoromethylhydrate and a cation selected from the group consisting of aluminum, iron (III), tin (II) and zirconium (IV), to form a dispersion and homogenizing the resultant dispersion; c) evaporating the organic solvent and recovering a resultant product; and d) washing and drying the resultant product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for the preparation of electrostatographic toner comprising the steps of:
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a) dissolving a polymer material in an organic solvent to form an organic phase; b) dispersing the organic phase in an aqueous phase comprising a particulate stabilizer to form a dispersion and homogenizing the resultant dispersion; c) adding a salt comprising an anion selected from the group consisting of chloride, oxychloride, sulfate, perchlorate, nitrate, dihydrogen phosphate, lactate, trifluoromethylsulfonate, and trifluoromethylhydrate and a cation selected from the group consisting of aluminum, iron (III), tin (II) and zirconium (IV), to the resultant dispersion; c) evaporating the organic solvent and recovering a resultant product; and d) washing and drying the resultant product. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification